the best quadratic unbiased estimation (bque) of variance components in the gauss-helmert model is used to combine adjustment of gps/levelling and geoid to determine the individual variance components for each of the three height types. through the research, different reasons for achievement of the negative variance components were discussed and a new modified version of the best quadratic unbi...

Introduction: Medical practitioners provide pre-employment examinations and periodic health examinations to seafarers, fishermen, offshore employees, and maritime students to ensure that they are fit for work. So far, very little is known about doctors’ perceptions of their professional training needs and expectations. The objective of this study was to gain insight on (a</...

BACKGROUND No global positioning system (GPS) technology study has been conducted among a sample of young gay, bisexual, and other men who have sex with men (YMSM). As such, the purpose of this study was to evaluate the feasibility and acceptability of using GPS methods to understand the spatial context of substance use and sexual risk behaviors among a sample of YMSM in New York City, a high-r...

A társadalmi élet mediatizációja a mindennapi gyakorlatok sokaságát formálja át, így gyalogos és gépkocsis útkeresést is. mozgások mediatizációjának átfogó, több területet érintő folyamatából tanulmány GPS-es navigációs eszközök széleskörű használatára hatására fókuszál. Amióta terjed műholdas rendszerrel ellátott használata, azóta növekszik – mind köznapi beszédben, zsurnalisztikai írásokban, ...

OBJECTIVE Personality disorders (PDs) often remain unrecognized in older adults by doctors in general practice. Therefore, this study evaluated the diagnostic accuracy of a screening instrument, the Gerontological Personality Disorder Scale (GPS), in a Dutch general-practice population of older adults. METHOD The psychometric properties of the GPS patient (GPS-pv) and informant (GPS-iv) versi...

Adsorption-desorption of the herbicide glyphosate (GPS) onto the clay mineral montmorillonite has been studied in presence of copper, in order to clarify the effects that this strongly complexing metal could have on the availability and mobility of GPS in soil environment. In contrast with previous findings, GPS adsorption on montmorillonite decreases in the presence of Cu, in solution or adsor...